package com.oracle.lingshangejia.utils;

import android.content.Context;
import android.content.SharedPreferences;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;

/**
 * Created by Sl on 2018/12/28.
 */

public class SpUtils {

        /**
         * 保存在手机里面的文件名
         */
        public static final String FILE_NAME = "lingshang_data";

        /**
         * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法
         *
         * @param context
         * @param key
         * @param object
         */
        public static void put(Context context, String key, Object object)
        {

            SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                    Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = sp.edit();

            if (object instanceof String)
            {
                editor.putString(key, (String) object);
            } else if (object instanceof Integer)
            {
                editor.putInt(key, (Integer) object);
            } else if (object instanceof Boolean)
            {
                editor.putBoolean(key, (Boolean) object);
            } else if (object instanceof Float)
            {
                editor.putFloat(key, (Float) object);
            } else if (object instanceof Long)
            {
                editor.putLong(key, (Long) object);
            } else
            {
                editor.putString(key, object.toString());
            }

            SharedPreferencesCompat.apply(editor);
        }

        /**
         * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值
         *
         * @param context
         * @param key
         * @param defaultObject
         * @return
         */
        public static Object get(Context context, String key, Object defaultObject)
        {
            SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                    Context.MODE_PRIVATE);

            if (defaultObject instanceof String)
            {
                return sp.getString(key, (String) defaultObject);
            } else if (defaultObject instanceof Integer)
            {
                return sp.getInt(key, (Integer) defaultObject);
            } else if (defaultObject instanceof Boolean)
            {
                return sp.getBoolean(key, (Boolean) defaultObject);
            } else if (defaultObject instanceof Float)
            {
                return sp.getFloat(key, (Float) defaultObject);
            } else if (defaultObject instanceof Long)
            {
                return sp.getLong(key, (Long) defaultObject);
            }

            return null;
        }

        /**
         * 移除某个key值已经对应的值
         * @param context
         * @param key
         */
        public static void remove(Context context, String key)
        {
            SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                    Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = sp.edit();
            editor.remove(key);
            SharedPreferencesCompat.apply(editor);
        }

        /**
         * 清除所有数据
         * @param context
         */
        public static void clear(Context context)
        {
            SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                    Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = sp.edit();
            editor.clear();
            editor.commit();
            //SharedPreferencesCompat.apply(editor);
        }

        /**
         * 查询某个key是否已经存在
         * @param context
         * @param key
         * @return
         */
        public static boolean contains(Context context, String key)
        {
            SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                    Context.MODE_PRIVATE);
            return sp.contains(key);
        }

        /**
         * 返回所有的键值对
         *
         * @param context
         * @return
         */
        public static Map<String, ?> getAll(Context context)
        {
            SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                    Context.MODE_PRIVATE);
            return sp.getAll();
        }

        /**
         * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类
         *
         * @author zhy
         *
         */
        private static class SharedPreferencesCompat
        {
            private static final Method sApplyMethod = findApplyMethod();

            /**
             * 反射查找apply的方法
             *
             * @return
             */
            @SuppressWarnings({ "unchecked", "rawtypes" })
            private static Method findApplyMethod()
            {
                try
                {
                    Class clz = SharedPreferences.Editor.class;
                    return clz.getMethod("apply");
                } catch (NoSuchMethodException e)
                {
                }

                return null;
            }

            /**
             * 如果找到则使用apply执行，否则使用commit
             *
             * @param editor
             */
            public static void apply(SharedPreferences.Editor editor)
            {
                try
                {
                    if (sApplyMethod != null)
                    {
                        sApplyMethod.invoke(editor);
                        return;
                    }
                } catch (IllegalArgumentException e)
                {
                } catch (IllegalAccessException e)
                {
                } catch (InvocationTargetException e)
                {
                }
                editor.commit();
            }
        }

}
